Free Course Image Introduction to Cybersecurity

Free online course Introduction to Cybersecurity

Duration of the online course: 7 hours and 43 minutes

4.8

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Build job-ready cybersecurity skills with this free online course—secure accounts, data, systems, and privacy with practical web security fundamentals.

In this free course, learn about

  • Cybersecurity Foundations and Account Security
  • Securing Data and Systems
  • Secure Software and Privacy

About the free online course

Cybersecurity is no longer just an IT concern; it is a core skill for anyone who works, studies, or builds on the internet. This free online course introduces you to the mindset and fundamentals needed to reduce risk, spot threats early, and make better security decisions in everyday digital life. Whether you are exploring a new career path in technology, aiming to protect your personal accounts, or looking to strengthen your understanding of modern web risks, you will gain a clear foundation you can apply immediately.

You will learn why strong security is not only about prevention, but also about detection and response. From there, the course builds practical intuition around securing accounts, including common failures that lead to takeovers and why tools like password managers matter. You will also understand what should never happen behind the scenes when websites handle credentials, and how modern practices protect users even if a system is compromised.

As you progress, you will connect the dots between data, systems, and software security. You will examine how information is protected in transit on the web, what modern encryption standards are meant to achieve, and how to reason about trust when data travels across networks you do not control. You will also develop a sharper eye for web application risks by learning why protections such as CSRF tokens exist and how attackers try to exploit normal user behavior.

Finally, the course addresses privacy in a practical way, helping you understand how tracking and fingerprinting work in web browsing and what that implies for anonymity and user choice. Throughout, short exercises reinforce key concepts, turning abstract ideas into concrete understanding. By the end, you will have a strong entry-level grasp of cybersecurity principles and a clearer sense of the habits and safeguards that help keep accounts, data, and systems resilient.

Course content

  • Video class: CS50 Cybersecurity - Introduction 02m
  • Exercise: In cybersecurity, why is it important to focus on both prevention and detection of threats?
  • Video class: CS50 Cybersecurity - Lecture 0 - Securing Accounts 1h13m
  • Exercise: What is one significant threat that a password manager addresses?
  • Video class: CS50 Cybersecurity - Lecture 1 - Securing Data 1h55m
  • Exercise: In the context of securing your account, why is it a bad practice for a server to store passwords in plain text?
  • Video class: CS50 Cybersecurity - Lecture 2 - Securing Systems 1h17m
  • Exercise: In the context of securing communication over the web, which protocol is the latest version used to encrypt HTTP traffic?
  • Video class: CS50 Cybersecurity - Lecture 3 - Securing Software 1h57m
  • Exercise: What is the purpose of using a CSRF token in web forms?
  • Video class: CS50 Cybersecurity - Lecture 4 - Preserving Privacy 1h18m
  • Exercise: Which of the following choices best describes the concept of 'fingerprinting' in the context of web browsing?

This free course includes:

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7 hours and 43 minutes of online video course

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Digital certificate of course completion (Free)

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Exercises to train your knowledge

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100% free, from content to certificate

Why should cybersecurity defenses include both threat prevention and detection?

Prevention reduces the chance of attacks succeeding, while detection helps identify and contain threats that bypass defenses.

Why is storing passwords in plain text a serious security risk?

A database breach would expose every password immediately, allowing attackers to access accounts and reuse credentials elsewhere.

What does a CSRF token protect web forms against?

It helps prevent attackers from tricking a logged-in user’s browser into submitting unauthorized requests to a website.

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Course comments: Introduction to Cybersecurity

CK

Chantelle Khumalo

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it actually teaches something that you can practically do it on your own by applying the knowledge you leant and my tutor Davin Malin is the best

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Kaili

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I’ve never had a professor like this! I can quickly grasp all this knowledge, and it’s much easier to understand! BEST PROFESSOR EVER!

NC

Notheron Clarke

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easy to understand and it starts you out slowly

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